Actor John Travolta, who co-starred with Olivia

Newton-John withinside the hit movie

musical "Grease", has published a assertion

in tribute to the overdue singer. "My expensive Olivia, you

made our complete lives a lot better," the actor wrote on

Instagram. "Your have an effect on changed into incredible. I love you a lot."

Newton-John and Travolta won worldwide

reputation once they starred as Bad Boy Danny

and Sweet Sandy withinside the 1978 movie musical "Grease".